[NET]: Annotate skb_copy_and_csum_bits() and callers.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/skbuff.h

@@ -1340,9 +1340,9 @@ extern int	       skb_copy_bits(const struct sk_buff *skb, int offset,
 				     void *to, int len);
 extern int	       skb_store_bits(const struct sk_buff *skb, int offset,
 				      void *from, int len);
-extern unsigned int    skb_copy_and_csum_bits(const struct sk_buff *skb,
+extern __wsum	       skb_copy_and_csum_bits(const struct sk_buff *skb,
 					      int offset, u8 *to, int len,
-					      unsigned int csum);
+					      __wsum csum);
 extern void	       skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to);
 extern void	       skb_split(struct sk_buff *skb,
 				 struct sk_buff *skb1, const u32 len);

net/core/skbuff.c

@@ -1315,8 +1315,8 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset,
 
 /* Both of above in one bottle. */
 
-unsigned int skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
-				    u8 *to, int len, unsigned int csum)
+__wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
+				    u8 *to, int len, __wsum csum)
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
@@ -1368,7 +1368,7 @@ unsigned int skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
 		struct sk_buff *list = skb_shinfo(skb)->frag_list;
 
 		for (; list; list = list->next) {
-			unsigned int csum2;
+			__wsum csum2;
 			int end;
 
 			BUG_TRAP(start <= offset + len);